The Tolong Siki script is not yet in Unicode. The script has a tentative allocation at U+11980..U+119BF in the  Roadmap to the SMP for the Unicode Standard.

A preliminary proposal for its inclusion has been submitted to the Unicode Technical Committee and WG2:

2010-04-08 Preliminary Proposal to Encode the Tolong Siki Script in the UCS — Anshuman Pandey ( WG2 N3811,  L2/10-106)